v0 and Backblaze B2 integration: Step-by-Step Guide 2025

 

Setting Up the Backblaze B2 Integration File

 

• Create a new TypeScript file in your project’s source directory and name it "backblazeIntegration.ts". This file will contain all the functions for communicating with Backblaze B2’s API using built-in fetch.
• Copy and paste the following code snippet into "backblazeIntegration.ts". In this snippet, replace "YOURKEYID" and "YOURAPPKEY" with your actual Backblaze B2 account credentials, and adjust any other parameters as needed.

// backblazeIntegration.ts

// Function to authorize your Backblaze account
export async function authorizeAccount(): Promise {
  const keyId = 'YOURKEYID';         // Replace with your Key ID
  const applicationKey = 'YOURAPPKEY';// Replace with your Application Key
  const credentials = btoa(${keyId}:${applicationKey});
  
  const response = await fetch('https://api.backblazeb2.com/b2api/v2/b2authorizeaccount', {
    method: 'GET',
    headers: {
      'Authorization': Basic ${credentials}
    }
  });
  
  if (!response.ok) {
    throw new Error('Authorization failed: ' + response.statusText);
  }
  
  const data = await response.json();
  return data;
}

// Function to get an upload URL using the authorization data
export async function getUploadUrl(authData: any, bucketId: string): Promise {
  const url = ${authData.apiUrl}/b2api/v2/b2_get_upload_url;
  
  const response = await fetch(url, {
    method: 'POST',
    headers: {
      'Authorization': authData.authorizationToken,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      bucketId: bucketId
    })
  });
  
  if (!response.ok) {
    throw new Error('Failed to get upload URL: ' + response.statusText);
  }
  
  const data = await response.json();
  return data;
}

// Function to upload a file to Backblaze B2
export async function uploadFile(uploadUrlData: any, file: File): Promise {
  // Compute SHA1 hash of the file, here we assume it to be not necessary if file is small 
  // Otherwise you would integrate a hashing function. For simplicity, this example uses a dummy value.
  const fileSha1 = 'donotverify';  // Use appropriate SHA1 hash if necessary

  const response = await fetch(uploadUrlData.uploadUrl, {
    method: 'POST',
    headers: {
      'Authorization': uploadUrlData.authorizationToken,
      'X-Bz-File-Name': encodeURIComponent(file.name),
      'Content-Type': 'b2/x-auto',
      'X-Bz-Content-Sha1': fileSha1
    },
    body: file
  });
  
  if (!response.ok) {
    throw new Error('File upload failed: ' + response.statusText);
  }
  
  const data = await response.json();
  return data;
}

 

Integrating Backblaze B2 Functions in Your Main Code

 

• Open the main TypeScript file of your v0 project where the file upload or API actions occur (for example, "index.ts" or "app.ts").
• Import the functions from "backblazeIntegration.ts" and then integrate them at the point in your code where you want to trigger a file upload.
• Ensure you handle asynchronous code using async/await or promise chains as demonstrated below.

// index.ts (or your main project file)

import { authorizeAccount, getUploadUrl, uploadFile } from './backblazeIntegration';

// Example function to handle a file upload event (e.g., from an HTML file input element)
async function handleFileUpload(file: File) {
  try {
    // Step 1: Authorize your Backblaze account
    const authData = await authorizeAccount();
    
    // Replace with your bucket's ID
    const bucketId = 'YOURBUCKETID';
    
    // Step 2: Get the upload URL for your bucket
    const uploadUrlData = await getUploadUrl(authData, bucketId);
    
    // Step 3: Upload the file using the upload URL
    const result = await uploadFile(uploadUrlData, file);
    
    console.log('Upload successful:', result);
  } catch (error) {
    console.error('Error during file upload:', error);
  }
}

// Example of binding the above function to a file input change event
document.getElementById('fileInput')?.addEventListener('change', (event) => {
  const target = event.target as HTMLInputElement;
  if (target.files && target.files[0]) {
    handleFileUpload(target.files[0]);
  }
});

 

Creating the HTML Element for File Input

 

• If your v0 project has an HTML file where you manage UI components, add or locate a file input element. For example, create an "index.html" file or update your existing HTML template with the following code snippet.
• This element will allow users to select files for upload.

<!-- index.html -->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Backblaze B2 Upload</title>
</head>
<body>
  <input type="file" id="fileInput" />
  <script src="index.js"></script>
</body>
</html>

 

Handling Dependency Installation Without a Terminal

 

• Since your v0 project does not have terminal access, you cannot run npm install. In this setup, the code uses the native fetch API which is available in modern browsers and Node.js environments provided by v0.
• Make sure that your v0 project configuration allows TypeScript to compile to JavaScript and that all necessary standard libraries (like fetch) are available.
• If you require additional dependencies in the future, check your project’s documentation for how to add external libraries by including them directly via a script tag or by pasting the source code as an additional file.

 

Final Testing

 

• Save all the changes in your project files.
• Trigger the upload by selecting a file using the file input element on your HTML page.
• Monitor the console output for success or error messages to verify the integration is functioning correctly.